As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED DURING APPROACH EXPERIENCED A TRAILING EDGE FLAP ASYMMETRY. LEFT FLAP 15DG AND RIGHT FLAP INDICATOR 12DG, FLAPS WOULD NOT MOVE FROM THIS POSITION. ACCOMPLISHED A GO-AROUND. EMERGENCY DECLARED FLIGHT LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NUMBER 7 SKEW SENSOR. SYSTEM GROUND CHECK NORMAL OPERATION.